On 8 September 2018 at 18:23, Aaron Ma <aaron.ma@xxxxxxxxxxxxx> wrote: > EFI GOP uses 64-bit frame buffer address in some BIOS. > Add 64bit address support in efi earlyprintk. > > Signed-off-by: Aaron Ma <aaron.ma@xxxxxxxxxxxxx> > --- > arch/x86/platform/efi/early_printk.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/x86/platform/efi/early_printk.c b/arch/x86/platform/efi/early_printk.c > index 5fdacb322ceb..c0ae25f59acd 100644 > --- a/arch/x86/platform/efi/early_printk.c > +++ b/arch/x86/platform/efi/early_printk.c > @@ -32,6 +32,8 @@ static __init int early_efi_map_fb(void) > return 0; > > base = boot_params.screen_info.lfb_base; > + if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) > + base |= (u64)boot_params.screen_info.ext_lfb_base << 32; > size = boot_params.screen_info.lfb_size; > efi_fb = ioremap(base, size); > > @@ -49,6 +51,8 @@ static __ref void *early_efi_map(unsigned long start, unsigned long len) > unsigned long base; > > base = boot_params.screen_info.lfb_base; > + if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) > + base |= (u64)boot_params.screen_info.ext_lfb_base << 32; > > if (efi_fb) > return (efi_fb + start); Please fix this in a way that works on 32-bit x86/PAE as well (i.e., use a suitable type for base)
